In 1844 Samuel Morse sent a telegram from Washington, D.C., to Baltimore using pulses of electrons to encode “What hath God wrought.” Now that message has gotten a reply, courtesy of physicist Kevin McFarland and a team of his colleagues.

“Neutrino” was the team’s tongue-in-cheek response, broadcast in the first-ever message carried by these ghostly particles. It was supposed to be “neutrinos,” but someone goofed and cut off the “s.”